Packed with technology, this FR shirt jacket is engineered for better range of movement. It's also made with quick duck, which is 30 percent lighter than sandstone duck, and water repellent, too. 8.5-Ounce, FR quick duck: 88 percent cotton/12 percent nylon with rain defender durable water repellent 7-ounce, FR twill lining: 88 percent cotton/12 percent high-tenacity nylon mighty back bi-swing between shoulders for instant recovery flex elbow for less restriction snap front two chest pockets with snap closures two inside patch pockets utility band at left chest two lower-front welt pockets adjustable two-snap cuffs triple-stitched main seams for durability locker loop facilitates hanging Carhartt FR label sewn on left pocket; NFPA 2112/cat 2 labels sewn on sleeve placket meets the performance requirements of NFPA 70E and is UL Classified to NFPA 2112